How is the Freezing Point of Water Affected by Salt?
According to the experts at Worsley School, the freezing temperature of ordinary water is 32 degrees Fahrenheit or 0 degrees Celsius. This is true of distilled water, but it will differ slightly when impurities are introduced. You will need distilled water, an ice cube tray, a freezer and table salt. Meter out the salt in carefully measured, small amounts; a ¼ teaspoon measuring spoon will come in handy. Fill two of the cups in the ice tray with distilled water with no salt added for your control subjects. Fill two others with distilled water and ¼ teaspoon of salt. Fill two more cups with distilled water and ½ teaspoon of salt. Fill more with other amounts of salt if desired. Be sure to fill the cups with the same amount of water. Place your tray in the freezer and check it at specific time intervals, perhaps every 10 minutes. Check the state of freezing as well as the temperature of each filled cup (optional) and record your findings. Repeat the experiment for more accurate results.
